Unknown electric draw

[riki5156]

Getting ready to put dual optimas in my 90D250 and the battery I'm taking out is an older coach battery from our motorhome thats about to die.I always do a draw test with a test light and wouldn't you know there is a light draw. I pulled every fuse and circuit breaker one at a time and then all taken out and the draw never went away.I called an auto electric shop and they quoted $90 per hour diagnostic. No thanks. Any ideas where to look next?

 

[Ozymandias]

Alternator first, Starter second.

 

[riki5156]

Yep too dark and cold to continue so tomorrow it is.thanks

 

[riki5156]

Going to check starter/alt today but friday I called a different shop who quoted me $190 an hour then tells me the just lowered the price.I said that must be your "I don't want to do it"price. Also doing a constant run solenoid on it for now till I find the issue.

 

[riki5156]

Found the problem. Shorted electric brake controller.Unplugged it and problem went away. I have a new one on the shelf which I will hook up after the snow is gone.

 

[Fastback67]

I had the same issue with mine once. The brake controller wasn't bad though, it was just all crapped up creating an issue.